:root{--paper:#FFF8F2;--white:#FFFFFF;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--faint:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--line:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.75 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto;object-fit:contain}button{font:inherit}.locked{overflow:hidden}.masthead{position:fixed;z-index:50;top:0;left:0;right:0;height:72px;background:rgba(255,248,242,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.masthead-inner{height:100%;max-width:1160px;margin:auto;padding:0 20px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.square-btn,.text-btn,.close-btn{border:0;background:transparent;color:var(--ink);cursor:pointer}.square-btn{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;font-size:22px}.brand{justify-self:center;display:flex;align-items:center;font-size:24px;font-weight:800;color:var(--ink)}.brand-logo{max-height:38px;max-width:220px}.mast-actions{justify-self:end;display:flex;gap:8px;align-items:center}.text-btn,.app-link{min-height:44px;padding:10px 16px;border-radius:999px}.app-link{background:linear-gradient(135deg,var(--indigo),var(--pink) 55%,var(--amber));color:#fff}.chapter-band{position:fixed;top:72px;left:0;right:0;z-index:45;height:46px;background:#fff;border-bottom:1px solid var(--line)}.chapter-inner{max-width:1160px;height:100%;margin:auto;display:flex;justify-content:center;align-items:center;gap:38px}.chapter-inner a{height:100%;display:flex;align-items:center;position:relative;color:var(--muted)}.chapter-inner a.active{color:var(--ink);font-weight:700}.chapter-inner a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--pink);border-radius:3px}.site-main{padding-top:118px}.wrap{max-width:1160px;margin:auto;padding:56px 20px}.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}.hero.single{grid-template-columns:1fr}.eyebrow{color:var(--pink);font-weight:800;letter-spacing:.16em}.hero h1,.page-hero h1{font-size:clamp(28px,5vw,34px);line-height:1.25;margin:.25em 0 .55em;color:var(--ink)}.hero p,.page-hero p{max-width:760px;color:var(--muted)}.hero-media img,.section-media img{max-height:360px;margin:auto;border-radius:20px;box-shadow:var(--shadow)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.btn{min-height:44px;display:inline-flex;align-items:center;padding:10px 18px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:700}.btn.primary{color:#fff;border:0;background:linear-gradient(135deg,var(--indigo),var(--pink) 55%,var(--amber))}.btn:hover,.btn:focus-visible,.app-link:hover,.app-link:focus-visible{transform:translateY(-1px);box-shadow:var(--shadow);outline:2px solid rgba(99,102,241,.35);outline-offset:2px}.section{margin-top:72px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}.section-head h2{margin:0;color:var(--ink);font-size:26px}.section-head p{margin:0;color:var(--muted);max-width:680px}.tag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tag-card,.card,.paper-card,.notice{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.tag-card .dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px}.c1{background:var(--pink)}.c2{background:var(--indigo)}.c3{background:var(--cyan)}.c4{background:var(--amber)}.tag-card h3,.card h3,.paper-card h3{margin:.4em 0;color:var(--ink)}.tag-card p,.card p,.paper-card p{color:var(--muted)}.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;align-items:start}.split.no-image{grid-template-columns:1fr}.chapter-list{display:grid;gap:12px}.chapter-item{display:grid;grid-template-columns:70px 1fr;gap:14px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.chapter-item strong{font-size:28px;color:var(--indigo)}.chapter-item:nth-child(2) strong{color:var(--pink)}.chapter-item:nth-child(3) strong{color:var(--cyan)}.chapter-item:nth-child(4) strong{color:var(--amber)}.masonry3{columns:3 260px;column-gap:16px}.masonry3 .card{break-inside:avoid;margin:0 0 16px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.step{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.step b{display:block;color:var(--pink);font-size:24px}.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.theme-grid .card:nth-child(2n){transform:translateY(10px)}.shelf-list{display:grid;gap:12px}.shelf-row{display:grid;grid-template-columns:150px 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);padding:18px 20px;border-radius:16px}.shelf-row b{color:var(--ink)}.shelf-row span{color:var(--muted)}.number-list{display:grid;gap:14px}.number-row{display:grid;grid-template-columns:84px 1fr;gap:16px;align-items:start;padding:22px;background:#fff;border:1px solid var(--line);border-radius:18px}.number-row .num{font-size:44px;line-height:1;font-weight:900;color:var(--indigo)}.number-row:nth-child(2) .num{color:var(--pink)}.number-row:nth-child(3) .num{color:var(--cyan)}.number-row:nth-child(4) .num{color:var(--amber)}.number-row:nth-child(5) .num{color:var(--mint)}.timeline{position:relative;margin-left:18px;padding-left:32px;border-left:2px solid var(--line)}.timeline article{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;margin:0 0 20px}.timeline article:before{content:"";position:absolute;left:-41px;top:26px;width:16px;height:16px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 5px var(--paper)}.status{display:inline-block;padding:5px 10px;border-radius:999px;background:var(--soft);color:var(--ink);font-size:13px}.page-hero{padding-bottom:12px;border-bottom:1px solid var(--line)}.content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.content-grid.three{grid-template-columns:repeat(3,1fr)}.prose{max-width:840px}.prose h2{margin-top:2em;color:var(--ink)}.prose p{color:var(--text)}.prose .editor-note{border-left:4px solid var(--pink);background:#fff;padding:16px 18px;border-radius:0 16px 16px 0}.faq{display:grid;gap:14px}.faq details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px}.faq summary{cursor:pointer;font-weight:800;color:var(--ink)}.faq p{color:var(--muted)}.site-footer{background:var(--ink);color:#F7EFE6;margin-top:70px}.footer-inner{max-width:1160px;margin:auto;padding:46px 20px calc(46px + env(safe-area-inset-bottom))}.footer-logo{max-height:34px;max-width:190px;margin-bottom:12px;filter:brightness(0) invert(1)}.footer-brand strong{display:block;font-size:22px}.footer-brand span{opacity:.72}.footer-brand p{max-width:700px;color:#d9d0e6}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin:34px 0}.footer-groups h2{font-size:16px}.footer-groups a{display:block;color:#d9d0e6;margin:7px 0}.copyright{border-top:1px solid rgba(255,255,255,.14);padding-top:18px;color:#c8bfd7}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.56);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.show{opacity:1;visibility:visible;pointer-events:auto}.book-menu,.search-modal{position:fixed;z-index:90;left:50%;top:50%;transform:translate(-50%,-50%) scale(.98);background:var(--paper);border:1px solid var(--line);box-shadow:0 24px 80px rgba(0,0,0,.25);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.book-menu.show,.search-modal.show{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}.book-menu{width:min(840px,calc(100vw - 32px));max-height:82vh;overflow:auto;border-radius:22px}.book-head{position:sticky;top:0;background:var(--paper);z-index:2;display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}.book-brand{display:flex;align-items:center;gap:12px}.book-brand img{max-height:32px;max-width:150px}.close-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);font-size:25px}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-pages section{padding:24px}.book-pages section:nth-child(odd){border-right:1px solid var(--line)}.book-pages h2{color:var(--ink)}.book-pages a{display:block;padding:12px 0;border-bottom:1px dashed var(--line)}.book-pages b{display:block;color:var(--ink)}.book-pages span{display:block;color:var(--muted);font-size:14px}.search-modal{width:min(560px,calc(100vw - 32px));border-radius:22px;padding:28px}.search-close{position:absolute;right:18px;top:18px}.search-modal h2{color:var(--ink);padding-right:54px}.search-look{border:1px solid var(--line);border-radius:14px;padding:16px;color:var(--faint);background:#fff}.preset-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.preset-links a{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid var(--line)}.mobile-bottom{display:none}.search-trigger{display:inline-flex;align-items:center}.pill-row{display:flex;flex-wrap:wrap;gap:10px}.pill{padding:7px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--muted)}.notice{border-left:4px solid var(--amber)}
@media(max-width:860px){.chapter-band{display:none}.site-main{padding-top:72px}.masthead-inner{grid-template-columns:52px 1fr auto;padding:0 16px}.desktop-search{display:none}.brand{justify-self:center}.brand-logo{max-width:150px}.app-link{padding:9px 12px}.hero,.split{grid-template-columns:1fr}.tag-grid,.steps,.theme-grid,.content-grid.three{grid-template-columns:repeat(2,1fr)}.book-pages{grid-template-columns:1fr}.book-pages section:nth-child(odd){border-right:0}.footer-groups{grid-template-columns:repeat(2,1fr)}.mobile-bottom{position:fixed;z-index:40;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--muted)}.mobile-bottom a.active{color:var(--pink);font-weight:800}.site-footer{padding-bottom:50px}.shelf-row{grid-template-columns:1fr}.section{margin-top:56px}.wrap{padding:40px 16px}.hero-media img,.section-media img{max-height:320px}}
@media(max-width:560px){.tag-grid,.steps,.theme-grid,.content-grid{grid-template-columns:1fr}.masonry3{columns:1}.footer-groups{grid-template-columns:1fr 1fr}.number-row{grid-template-columns:60px 1fr}.number-row .num{font-size:36px}.section-head{align-items:start;flex-direction:column}.hero{gap:24px}.book-menu{max-height:86vh}.brand{font-size:20px}}